1. It is clear to me that you don't know your lesson.
2. London is the capital of Great Britain.
3. At nine o'clock the lecturer entered (—) the hall, walked up to the table, put his bag on it, looked at everybody and began his lecture.
4. My explanation seemed strange to the teacher.
5. He gave her a big bunch of flowers.
6. We tried to speak to him, but he did not want to listen to us.
7. Yesterday the teacher spoke to us about the architecture of St. Petersburg.
8. My grandmother often complains of headache.
9. I am sorry, I cannot speak to you now, the professor is waiting for me.
10. I must go to the institute and explain to him some details of our work.
11. Many pages of this book are torn.
12. Everybody looked at me with surprise: they had not waited for me.
B may
2. A may
B may not
3. May
4. A may
B may not
5. may